<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>

</head>

<body>
    <!-- 组件嵌套使用 -->
        

    <div id="app">
        <h3>{{count}}</h3>
        <App>
            创建一个APP组件
            <Header>嵌套一个Header组件</Header>
        </App>
    </div>
    <script>
        const Header = Vue.extend({
            
            name:'Header',
            template:'<h3>这是嵌套组件Header</h3>'
            
        })
        
        const App = Vue.extend({
            name:'App',
            data(){
                return{
                    count:0
                }
            },
            components:{
                Header
            },
            template:`<div>App组件
                    <span>{{count}}</span>
                </div>`
        })


        Vue.config.productionTip = false
        const vm = new Vue({
            el: '#app',
            data() {
                return {
                    count: 0
                }
            },
            components:{
                App,
                
            }
            
        })

    </script>
</body>

</html>